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How can I achieve the same result but with a line separating the elements?

CodePudding user response：

You could use an item container style to draw a border at the bottom of each container.

<ListView.ItemContainerStyle>
   <Style TargetType="{x:Type ListViewItem}">
      <Setter Property="BorderThickness" Value="0,0,0,2"/>
      <Setter Property="BorderBrush" Value="Red"/>
   </Style>
</ListView.ItemContainerStyle>